Lock for banks



UNITED STATES PATENT OFFICE.

LINUS YALE, JR., OF NEWPORT, NEW YORK.

LOCK FOR BANKS.

Specification of Letters Patent No. 9,850, dated July 12, 1853.

To all whom t may concern Be it known that I, LINUS YALE, Jr., of Newport, in the count-y of Herkimer and State of New York, have invented a new and Improved Method of Constructing Locks for Banks, Safes, Stores, &c., which I call Yales Infallible Lockg and I do declare the following to be a full and exact description of the same, reference being had to the annexed drawings.

As in ordinary locks I lit into the case A the main bolt B having a notch a in which the wing Z9 on the hollow knob-shaft C works to move it. Across the main bolt B to hold it out when locked and in when unlocked is a cross-bolt D likewise moved by the before mentioned wing o', but moved before the wing reaches the notch in the main bolt. This cross-bolt has a projecting stop c which shuts down before and behind the similar stop ci on the main bolt. To prevent anyt-hing but an application of the proper key from moving the parts from the locked to the unlocked position and vice versa the said cross-bolt is prevented from rising sufficiently high to allow the main bolt to pass, by siX tumblers E E E, &c., guided in their movements by four studs e c e e upon the cross-bolt and a part of it, and kept from influencing one another by intermediate stationary plates f f f, &c. The lowest position of this cross-bolt presents the tongues h 7L &c., of the tumblers at the opening from the key chamber H. In raising the said cross-bolt to relieve the main bolt B, the tumblers are necessarily removed beyond reach through the key hole; and they cannot be made to impinge the fence F without being thus carried away from outside influence. The hollow 1mobshaft C has also another wing g which strikes the rear ends of the tumbler and. drives them forward to the key chamber in order that without springs, they may be made ready for the action of the key.

The key G has a wing L attached to the shaft i by a rivet y" and moves the tumblers notin the ordinary mode by sweeping across their edges but by projecting the said wing which contains the key proper or bits, against the before mentioned tongues of the tumblers in such a mann'er as to leave no tell tale indication of its size and form.

It will be seen that the hinge or rivet y" being a fourth of an inch from the center line of the key handle, if the handle is made to revolve while in the key chamber and held in place by the sink lc in the key chamber and the tongue or middle part of the key hole through the front plate or cover I, said wing h being likewise attached to the rivet j will be driven one half of an inch to the right and through the passage out of the key chamber H against the tumblers pushing each one its proper distance or until the notch Z in its upper edge is in line with the fence F.

To operate the lock the main bolt B being projected and the tumblers driven up to the key-chamber, the key G is inserted and turned a half revolution to the right which moves all of the tumblers to such a position that the notches in their edges are all in a line and perpendicularly under the fence, and then turned back again leaving them in that proper form. The knob-shaft C is then turned to the right and the wing o raises the cross-bolt up one half an inch, taking of course the tumblers with it and away from! the key hole-they still returning the impressed form of the key, consequently passing on to the fence far enough to allow the cross-bolt stop c to relieve the main bolt stop d. The wing b now takes hold of the notch a in the main bolt and moves it back at the same time sustaining the cross bolt until the main bolt has moved the proper distance and then lets it down again to its rst posit-ion, and the other wing g on the knob-shaft striking t-he tumblers moves them forward again of course displacing the notches and making them ready to be again impressed with the key, after which they are again carried across the fence by a counter revolution of the knobshaft and the main bolt again moved into the locked position, when the wing g completes the locking by driving all the tumblers again forward to the key chamber.

What I claim as new and of my invention and desire to secure by Letters Patent is:

1. Impressing the form of the key upon inert tumblers or their equivalents, which shall retain said impression while being separated from the key and beyond reach or influence through the key hole before they can touch the fence, for the purpose and in hole'when it moves them to the fence out of the nanner substanially as described. its looked position with the main bolt.

2. Claim in com inaton With inert tumblers the cross-bolt D, Which takes the strain LINUS YALE JUN' 5 of end pressure on the main bolt and acting Witnesses:

as a tumbler carriage to convey the tumblers C. A. BURTON, beyond reach or inuence through the key- J. H. Voos'rER. 

